Boat-propeller.



H. TAYLOR.

BOAT PROPELLERv APPLIUATION FILED mums, 1912.

1,067,385, Patented July 15, 1913.

YIIIlV/l I I w VA! Inn-nil!!!" UNITED sTA Es PATENT our-ion.

HARRY TAYLOR, OF HAMILTON, ONTARIO, CANADA, ASSIGNOR '10 HORACE WELLESLEY BURBITT, 0F TORONTO, CANADA.

BOAT-PROPELLER.

Specification of Letters Iatent.

Application. filed March 26, 1912. Serial No. 686,269.

To all whom it may concern Be it known that I, HARRYv TAYLOR, a subj ect of the King of Great Britain, of the city of Hamilton, in the county of Wentworth, in the Province of Ontario, Canada, have invented certain new and useful Improve ments in Boat-Propellers, of which the following is the specification.

My invention relates to improvements in boat propellers in which reversing blades are employed and the object of the invention is to provide means for easily reversing the blades of the propeller and to so improve the construction of the propeller as to prevent breaking and consequent loss of the blades and it consists essentially of a propeller shaft, a slidable sleeve held upon the shaft and having an annular groove therein, a vertical divided hub connected to the shaft at its outer end and keyed to the slidable sleeve, blades turnably held within the hub having crank pins extending into the aforesaid annular groove and an encircling rimin which Ais the ropeller s aft.

B is the ub comprising two members B" and B connected to ether in a vertical'plane by bolts B Each uhmember Bi and B is provided with semi-circular edge recesses B and B having ribs B extendin around.

the same intermediately of-the heig t of the recesses. Thehub member B is connected t the propeller shaft A-by a key A andby an end nut A threaded onto the end of the propeller shaft and locked thereon by a cross C are the propeller blades provided at,

their outer ends with tr1innions"( ]"-ai1d at their inner ends with enlargements C havmg annular grooves C therein. The enlarge.- ments C fit into the recesses B and B so that the tongues B thereof fit into and around the annular grooves C so as to turnably hold the blades. C in the hub B.-

is an operating sleeve encircling -the like letters of reference indicate correspondin parts in each figure shaft A and slidably extending into thehub B.- The outer endof thesleeve within the hub is provided with an enlargement D having an annulargroove. D 'therein. The

enlargements C of'the blade Clare provided with rollers C journaled 'on crank pins C mdicated by dotted lines in Fig? 3. The rollers Cf extend into the annular-groove D as indicated particularly in Figs. 2 and 3.

E is a feather key secured within the hub and extending into a groove E in -one of the annular flanges of the enlargement D forming the groove D'-. )7

It will seen by operating the sleeve D longitudinally that the groove 2 engaging with the rollers C serve to swing the blades C around in their bearings formed by the enlargement C and trunnion Q either into the reverse or forward position. It will also be seen that by journalingthe blades at their inner end in the hub and "at the outer end in the rim that a secure support will be formed for the blades which will not allow the blades to break away as is the case where the blades are ends.

In former constructions when reversing only supported at their inner Patented Jilly 15, 1913.

the blades the whole hub is slidably moved on the propeller shaft against the torsional strain of the hub due to the water pressure on the blades. In my-form the hub is solidly connected to the propeller shaft and the blades alone are turned against the pressure ported upon the shaft having an annular.

groove therein, an encircling rim, blades journaled at their inner ends in the hub and thus rendering the operation of my device 7 at their outer ends in the rim, and crank rollers journaled on the inner'ends of the blade members extending into the annular groove of the'sleeve as and for the purpose specified.

2. A propeller comprising a hub secured to the propeller shaft, a sleeve slidably held upon thepropeller "shaft and extending within the huband feathered to the hub, an I encircling rim, propeller blades'journaled at their outer ends in the rim and at their inner ends in the hub, and crank rollers extending into the annular groove of the longitudithe hub, crank rollers journaled on the inner nally slidable sleeve, as and for the purpose enlargements of the blades, and a longitudispecified. lially slidable sleeve having an annular 3. A propeller comprising a cross divided groove into which the rollers extend and '5 hub having semi-circular tongued recesses in slidably held on the propeller shaft, as and 15 the opposing edges thereof, an encircling for the purpose specified.

rim, blade members provided with trunnions HARRY TAYLOR. at their outer ends journaled in the rim and Witnesses: enlargements at their inner ends having an- B. BOYD,

l 10 nular grooves fitting the tongued recesses of M. EGAN. 

